Automatic weighing device.



T. ZOLLNER:

AUTOMATIC WEIGHING DEVICE PLIOATIQN mum no: a, 1911.

Patentea qov. 19, 1912.

ZOLLNER. AUTOMATIC EIG-HING 121311105. APPLICATION FILED 119V. 6 1-911; 7 I I.

' Patented NOV. 19, 1-912.

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onnrsn srurus reruns OFFICE- moons seem, mus.

'lpeeifleltim of Letters rams.

Application filed November t, 1911. Serial No. 658,682.

. citizen of the United States, and a resident of Duluth, in the county of St. Louis and State of Minnesota, have invented a new and useful Automatic Weighing Device, of which the following is e specification.

My present invention has for its object the provision of suitable mechanism for autometically delivering to a suitable scale or weighing device which may be set to weigh the desired uantity, the amount of the coiniuodity whic will balance the scale and will then automatically shut ofi' the supply.

While my device may be employed with a great variety of commodities, it is especiall.

esigned forend umful in handling SD81 commodities as flour, fine pulverized sugar,

corn starch, ground coffee,- potato flour, and i the like, which on account of their consistency will pack and clog ordinary weighing mechanisms, and on that account are at present weighed out and pecked'b hand.

I attain the above object y the mechanism illustrated in the accompanying drewi ings, in which Figure 1 is an elevation, purtmll in sec tion of one side of my invention; 2 is an e ovation of the rear end; Fig. 3 is on elevationof the front end; Fig. 4 1S a sectional t detail of the clutch; and Fig. 5 is a detail of the electric contact device operable by the scale,

Smaller reference numerals refer to sumlar arts throughout the several views.

for holding the mechanism. erds are substantially Y shaped, and are held in suitable relation to one another by the side bars 3. The standards are broeo- I ened out at the bottom to form asubstantial and suitable foot or base, which may be 4 screwed down to a table or door for greater rigidity, if desired. The arms, 5, forming the u per art of the standards, 1 and 2, apother at an acute angleend at I'OflC 83C lauuncture are rounded to receive the CI!- As will be seen clearly item Fig. 1, the

conveyor tube extends beyond both the front andrear of the hopper, and is closed on both ends by the cups, 8, which screw to the ends thereof. The caps, 8, are centrally bored, and extended to form the journals or boxings, 9, which have the covers, 10, secured holes, 12, are provided in the journal covers, 10, and the bore in the caps, 8, is provided with an annular groove, 13, for packing to prevent the material being weighed getting into the bearings, and the oil from the bearin-gs getting into the material being weighed. Mounted in the journals, 9, is a shaft, 14, upon which, within the conveyor tube, and extending to a short distance from the forward end thereof is secured e helical or screw conveyor blade, 15. To drive the shaft, 14-, and conveyor blade, 15, I provide the following structure: Upon the shaft, just back of the rear journal is secured by a screw, 1.6, s set collar, 17, back of which r0- tetably mounted upon said shaft, 14, is a wheel, 18, the periphery of which is provided with gear teeth, 19, and upon the rear face of which is provided the conical receiving member, 20, which may be lined with leather or other friction material, 21, of a upon the shaft, 14.

The shaft, let, is provided with a slot or splinewey, 23, into which projects the key or feather, 24, carried b the collar 25, upon the forward end of w ich is the entering e reference numerals 1 and 2 desi .iate j the front end rear standards of the reme j These stendmember, 26, '01 the cone clutch. Themoller, 25, and member 26, are normally pressed forward into engagement by a spring, 26", provided about the shaft, 14, between the rear face of the collar, 525, and a set collar,

ler, 25, has an annular channel therein into which sets a collar, Q8, having lateral lugs or projections, 29, thereon which are adapted to he engaged by the arms 30 of a yoke ,Upon the under part of forwerd'n'n of the conveyor tube, 6, which extends'some for the delivery of the material from the conveyor to the scale. This part has a downwerdly extending pipe, 33, bout it, the bet- 5 tom of which is closed by e horizontally sliding gate, at. Tothe no of the tube or distance in front of the hopper is a port, 32,

PdtentedNov.19,1912.

thereto by suitable nuts, 11. Suitable conical clutch. Another set collar, 22, to the rear of the wheel, 18, keeps it in position 27, upon the rear end of the shaft. The colended lever-arm, v31, of 3 system of levers ta be hereafter described.

apron hem c :t'ie

and at the in or out 1: wer mechaiili' lld to the tl'irougii on i, to e point Piro'lally con- 1 ed, 3-36,; a lever u hrzichet, undzird, shove the nei'it Wit or link, 39, w u hoie, H?

0* iii, UL,

witch and eve provided 1e scales, the 1 the 4, 1i mlmuism 0 stop the conveyor and .ose the gate, ;-f, when the proper amount en delivered to the scale pen, I have 1 rtiinrgn secured to R i uno rear face of The poles this magnet t of the lever arm, 31, 39, and at h it suitable :cale arm I h, ve l9, which ag'='inst the d v heron by a weigl'i 2nd. Depending from th 50*, to which is secured tor rushing and breaking the is curried into or out of contact 523, which are arranged in suitable source of electric euromugnet, (ii. If is that; then the scale is empty in is up, the contact will he e action of the spring, 26, in engagement and the gate U motor, 551., u", nderd, 2, ti e i oral teeth, 19, of t e wilt f To take the thrust cit is considerable in wijirliii which are inclined to upon the There to be d not iiQCi Jury, in order to prevent the ck ing oi. the commodity and the steppe the nzeelmn: The first of these feetur is the partition 59 set in the hoppe at 9 angle with the shaft, 1d, which only permits material to reach the conveyor from the rear of the hopper and leeres :1 free space, 60, art 1nd or shore the forward end of the convey er. The eouveyer, because of its tendency to peel: and clog, takes the C flTUTiOdllZy unevenly, sometimes more, sometimes less than the proper amount. The excess in l of stopper; the machinery, accurate in ti space, 60, and from there s heel into the conve er to make up the v which occurs when the conveyer cieue s to get all it should. This arrangeuent iminiains an even and uniform deoil the material from the port,

le second feature for preveiili'ing t e H of the machine consists of i knife, 61, secured to the shzi'f, 1 35, just heel; of the forward cap, 8. The blade of this knife is slanted in an opposite direction to the conveyor blade, 15, and serves to prevent any of the commodity becoming packed in the forward end of the conveyer tube. A, suihlole cover 62 is provided for the hopper. Having thus described. my invention, What I claim as new, and desire to secure by Letters Patent, is

A Weighing mechanism comprising a hopper, v. shaft disposed longitudinally in the bottom thereof, a helical or screw conveyer blade secured to said shaft, ti port from said hopper adjacent said conveyor, driven Wheel rotntuhly mounted upon said sh: a friction clutch for engaging and disengaging said driven Wheel and said shaft, a, spring for holding said clutch nerinally in engagement, a gate for closing said orl', co-ueting lever arms for (pening and sing said and throwing said clutch out of en gemont, an electroinagnet for operating 5 1d lever arms to disengage said clutch and close said gate, scales and Contact n'iechunism actu-tited by the movement of said smles for causing :i current to flow through said magnet.

2. A weighing mechanism coi'nprising a pair of scales, a, hopper, :1 conveyor tube e' tendinq longitudinally of said hopper, a pert from said conveyor tube to said scales,

tube, a gate to close in said conveyer clutch for connecting and disconnecting said COHYG YGI fIOIll El SOUICG 5 for normally holding of power, a spring said clutch in engagement, coupled lever a rms for opening said gate and releasing said simultaneously clutch,

and means controlled by the movement of said scales for operating said lever arms.

pair of scales,

disposed longitudinally 3 In a Wei hin machine COUIHlSlD a v H. C D

a hopper.

a conveyor tube said hopper, an

opening from said hopper into said tube, an opening from said tube above said scales, a

15 helical or screw conveyor in-said tube and a knife blade set inthe end of said conveyer at an angle with said helical screw.

4. I n a weighing machine a hopper,

"pair of scales,

20 conveyor for conveylng comprising a material from said a helical or screwhopper to said scales and a knife blade disposed in the end of said conveyer at an angle with the screw thereof.

5. In a weighing machine comprising a pair of scales, a hopper, a conveyer tube for conveying material from said hopper to said scales, a screw conveyer in said conveyer tube, an opening from said hopper to said tube, an opening from said conveyer to said scales, anda compartment intermediate said openings into which any excess taken by said screw from said hopper may be discharged and from which any deficiency may be made up. I

In testimony whereof I aflix my signature in the presence of two witnesses.

THEODORE ZOLLNER.

Witnesses:

H. A. EARNSHAW, J. E. MAcGREeoR. 

